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#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <wlr/backend/interface.h>
#include <wlr/backend/udev.h>
#include <wlr/backend/session.h>
#include <wlr/util/log.h>
#include "backend/multi.h"
struct subbackend_state {
struct wlr_backend *backend;
struct wlr_backend *container;
struct wl_listener input_add;
struct wl_listener input_remove;
struct wl_listener output_add;
struct wl_listener output_remove;
};
static bool multi_backend_start(struct wlr_backend *_backend) {
struct wlr_multi_backend *backend = (struct wlr_multi_backend *)_backend;
for (size_t i = 0; i < backend->backends->length; ++i) {
struct subbackend_state *sub = backend->backends->items[i];
if (!wlr_backend_start(sub->backend)) {
wlr_log(L_ERROR, "Failed to initialize backend %zd", i);
return false;
}
}
return true;
}
static void multi_backend_destroy(struct wlr_backend *_backend) {
struct wlr_multi_backend *backend = (struct wlr_multi_backend *)_backend;
for (size_t i = 0; i < backend->backends->length; ++i) {
struct subbackend_state *sub = backend->backends->items[i];
wlr_backend_destroy(sub->backend);
free(sub);
}
list_free(backend->backends);
wlr_session_finish(backend->session);
wlr_udev_destroy(backend->udev);
free(backend);
}
static struct wlr_egl *multi_backend_get_egl(struct wlr_backend *_backend) {
struct wlr_multi_backend *backend = (struct wlr_multi_backend *)_backend;
for (size_t i = 0; i < backend->backends->length; ++i) {
struct subbackend_state *sub = backend->backends->items[i];
struct wlr_egl *egl = wlr_backend_get_egl(sub->backend);
if (egl) {
return egl;
}
}
return NULL;
}
struct wlr_backend_impl backend_impl = {
.start = multi_backend_start,
.destroy = multi_backend_destroy,
.get_egl = multi_backend_get_egl
};
struct wlr_backend *wlr_multi_backend_create(struct wlr_session *session,
struct wlr_udev *udev) {
struct wlr_multi_backend *backend =
calloc(1, sizeof(struct wlr_multi_backend));
if (!backend) {
wlr_log(L_ERROR, "Backend allocation failed");
return NULL;
}
backend->backends = list_create();
if (!backend->backends) {
free(backend);
wlr_log(L_ERROR, "Backend allocation failed");
return NULL;
}
wlr_backend_init(&backend->backend, &backend_impl);
backend->session = session;
backend->udev = udev;
return &backend->backend;
}
bool wlr_backend_is_multi(struct wlr_backend *b) {
return b->impl == &backend_impl;
}
static void input_add_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, input_add);
wl_signal_emit(&state->container->events.input_add, data);
}
static void input_remove_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, input_remove);
wl_signal_emit(&state->container->events.input_remove, data);
}
static void output_add_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, output_add);
wl_signal_emit(&state->container->events.output_add, data);
}
static void output_remove_reemit(struct wl_listener *listener, void *data) {
struct subbackend_state *state = wl_container_of(listener,
state, output_remove);
wl_signal_emit(&state->container->events.output_remove, data);
}
void wlr_multi_backend_add(struct wlr_backend *_multi,
struct wlr_backend *backend) {
assert(wlr_backend_is_multi(backend));
struct wlr_multi_backend *multi = (struct wlr_multi_backend *)_multi;
struct subbackend_state *sub = calloc(1, sizeof(struct subbackend_state));
sub->backend = backend;
sub->container = &multi->backend;
sub->input_add.notify = input_add_reemit;
sub->input_remove.notify = input_remove_reemit;
sub->output_add.notify = output_add_reemit;
sub->output_remove.notify = output_remove_reemit;
wl_list_init(&sub->input_add.link);
wl_list_init(&sub->input_remove.link);
wl_list_init(&sub->output_add.link);
wl_list_init(&sub->output_remove.link);
wl_signal_add(&backend->events.input_add, &sub->input_add);
wl_signal_add(&backend->events.input_remove, &sub->input_remove);
wl_signal_add(&backend->events.output_add, &sub->output_add);
wl_signal_add(&backend->events.output_remove, &sub->output_remove);
list_add(multi->backends, sub);
}
struct wlr_session *wlr_multi_get_session(struct wlr_backend *_backend) {
assert(wlr_backend_is_multi(_backend));
struct wlr_multi_backend *backend = (struct wlr_multi_backend *)_backend;
return backend->session;
}
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